pox
package com.sailing.util;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.geom.AffineTransform;
import java.awt.image.BufferedImage;
import java.awt.image.ColorModel;
import java.awt.image.WritableRaster;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.rendering.PDFRenderer;
/**
* Hello world!
*
*/
public class Pdf2Img {
public static void main(String[] args) {
// 將pdf裝圖片 并且自定義圖片得格式大小
File file = new File("E:\\workALL\\java\\content.pdf");
try {
PDDocument doc = PDDocument.load(file);
PDFRenderer renderer = new PDFRenderer(doc);
int pageCount = doc.getNumberOfPages();
System.out.println(pageCount);
for (int i = 0; i < pageCount; i++) {
BufferedImage image = renderer.renderImageWithDPI(i, 196); // Windows
BufferedImage srcImage = resize(image, 1000, 1240);// 產生縮略圖
File file2 = new File("E:\\workALL\\java\\content\\com" + System.currentTimeMillis() + ".png");
if (file2.exists()) {
System.out.println("file exists");
} else {
System.out.println("file not exists, create it ...");
try {
//file2.createNewFile();
ImageIO.write(srcImage, "PNG", file2);
} catch (IOException e) {
e.printStackTrace();
}
}
}
} catch (IOException e) {
e.printStackTrace();
}
}
private static BufferedImage resize(BufferedImage source, int targetW, int targetH) {
int type = source.getType();
BufferedImage target = null;
double sx = (double) targetW / source.getWidth();
double sy = (double) targetH / source.getHeight();
if (sx > sy) {
sx = sy;
targetW = (int) (sx * source.getWidth());
} else {
sy = sx;
targetH = (int) (sy * source.getHeight());
}
if (type == BufferedImage.TYPE_CUSTOM) {
ColorModel cm = source.getColorModel();
WritableRaster raster = cm.createCompatibleWritableRaster(targetW, targetH);
boolean alphaPremultiplied = cm.isAlphaPremultiplied();
target = new BufferedImage(cm, raster, alphaPremultiplied, null);
} else {
target = new BufferedImage(targetW, targetH, type);
}
Graphics2D g = target.createGraphics();
g.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
g.drawRenderedImage(source, AffineTransform.getScaleInstance(sx, sy));
g.dispose();
return target;
}
}
